source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h.asm@ 173

Last change on this file since 173 was 167, checked in by aitotat@…, 13 years ago

Changes to XTIDE Universal BIOS:

  • Old Int 13h transfer functions work again.
  • Fixes to eINT13h (EBIOS) support.
File size: 10.5 KB
RevLine 
[90]1; Project name : XTIDE Universal BIOS
[3]2; Description : Int 13h BIOS functions (Floppy and Hard disk).
3
4; Section containing code
5SECTION .text
6
7;--------------------------------------------------------------------
8; Int 13h software interrupt handler.
9; Jumps to specific function defined in AH.
10;
[148]11; Note to developers: Do not make recursive INT 13h calls!
12;
13; Int13h_DiskFunctionsHandler
[3]14; Parameters:
15; AH: Bios function
16; DL: Drive number
[148]17; Other: Depends on function
[3]18; Returns:
19; Depends on function
20;--------------------------------------------------------------------
21ALIGN JUMP_ALIGN
[148]22Int13h_DiskFunctionsHandler:
[3]23 sti ; Enable interrupts
[150]24 cld ; String instructions to increment pointers
[155]25 CREATE_FRAME_INTPACK_TO_SSBP EXTRA_BYTES_FOR_INTPACK
[3]26
27 call RamVars_GetSegmentToDS
[148]28 call DriveXlate_ToOrBack
29 mov [RAMVARS.xlateVars+XLATEVARS.bXlatedDrv], dl
[3]30 call RamVars_IsFunctionHandledByThisBIOS
31 jnc SHORT Int13h_DirectCallToAnotherBios
[148]32 call FindDPT_ForDriveNumber ; DS:DI now points to DPT
[3]33
34 ; Jump to correct BIOS function
[148]35 eMOVZX bx, ah
36 shl bx, 1
[165]37 cmp ah, 25h ; Possible EBIOS function?
38 ja SHORT .JumpToEbiosFunction
[148]39 jmp [cs:bx+g_rgw13hFuncJump] ; Jump to BIOS function
[3]40
[165]41 ; Jump to correct EBIOS function
42ALIGN JUMP_ALIGN
43.JumpToEbiosFunction:
[167]44 test BYTE [cs:ROMVARS.wFlags], FLG_ROMVARS_FULLMODE
45 jz SHORT Int13h_UnsupportedFunction ; No eINT 13h in lite mode
46 test BYTE [di+DPT.bFlagsLow], FLG_DRVNHEAD_LBA
47 jz SHORT Int13h_UnsupportedFunction ; No eINT 13h for CHS drives
48 cmp ah, 48h
[165]49 ja SHORT Int13h_UnsupportedFunction
[167]50 sub bx, 41h<<1 ; BX = Offset to eINT 13h jump table
[165]51 jl SHORT Int13h_UnsupportedFunction
52 jmp [cs:bx+g_rgwEbiosFunctionJumpTable]
[3]53
[165]54
[3]55;--------------------------------------------------------------------
[148]56; Int13h_UnsupportedFunction
[3]57; Int13h_DirectCallToAnotherBios
58; Parameters:
[148]59; DL: Translated drive number
[3]60; DS: RAMVARS segment
[150]61; SS:BP: Ptr to IDEPACK
[148]62; BX, DI: Corrupted on Int13h_DiskFunctionsHandler
[161]63; Other: Function specific INT 13h parameters
[3]64; Returns:
65; Depends on function
66; Corrupts registers:
67; Flags
68;--------------------------------------------------------------------
69ALIGN JUMP_ALIGN
70Int13h_UnsupportedFunction:
71Int13h_DirectCallToAnotherBios:
[148]72 call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
[150]73 mov bx, [bp+IDEPACK.intpack+INTPACK.bx]
74 mov di, [bp+IDEPACK.intpack+INTPACK.di]
75 mov ds, [bp+IDEPACK.intpack+INTPACK.ds]
76 push WORD [bp+IDEPACK.intpack+INTPACK.flags]
[148]77 popf
78 push bp
[150]79 mov bp, [bp+IDEPACK.intpack+INTPACK.bp]
[148]80 int BIOS_DISK_INTERRUPT_13h ; Can safely do as much recursion as it wants
[3]81
[148]82 ; Store returned values to INTPACK
83 pop bp ; Standard INT 13h functions never uses BP as return register
84%ifdef USE_386
[150]85 mov [bp+IDEPACK.intpack+INTPACK.gs], gs
86 mov [bp+IDEPACK.intpack+INTPACK.fs], fs
[148]87%endif
[150]88 mov [bp+IDEPACK.intpack+INTPACK.es], es
89 mov [bp+IDEPACK.intpack+INTPACK.ds], ds
90 mov [bp+IDEPACK.intpack+INTPACK.di], di
91 mov [bp+IDEPACK.intpack+INTPACK.si], si
92 mov [bp+IDEPACK.intpack+INTPACK.bx], bx
93 mov [bp+IDEPACK.intpack+INTPACK.dh], dh
94 mov [bp+IDEPACK.intpack+INTPACK.cx], cx
95 mov [bp+IDEPACK.intpack+INTPACK.ax], ax
[148]96 pushf
[150]97 pop WORD [bp+IDEPACK.intpack+INTPACK.flags]
[148]98 call RamVars_GetSegmentToDS
99 cmp dl, [RAMVARS.xlateVars+XLATEVARS.bXlatedDrv]
100 je SHORT .ExchangeInt13hHandlers
[150]101 mov [bp+IDEPACK.intpack+INTPACK.dl], dl ; Something is returned in DL
[148]102ALIGN JUMP_ALIGN
103.ExchangeInt13hHandlers:
104 call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
105 ; Fall to Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
[3]106
107
108;--------------------------------------------------------------------
[148]109; Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
110; Int13h_ReturnFromHandlerWithoutStoringErrorCode
[32]111; Parameters:
[148]112; AH: BIOS Error code
[150]113; SS:BP: Ptr to IDEPACK
[32]114; Returns:
[148]115; All registers are loaded from INTPACK
[32]116;--------------------------------------------------------------------
117ALIGN JUMP_ALIGN
[148]118Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH:
[150]119 call Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH
[148]120Int13h_ReturnFromHandlerWithoutStoringErrorCode:
[150]121 or WORD [bp+IDEPACK.intpack+INTPACK.flags], FLG_FLAGS_IF ; Return with interrupts enabled
[148]122 mov sp, bp ; Now we can exit anytime
[155]123 RESTORE_FRAME_INTPACK_FROM_SSBP EXTRA_BYTES_FOR_INTPACK
[32]124
125
126;--------------------------------------------------------------------
[148]127; Int13h_CallPreviousInt13hHandler
[3]128; Parameters:
[148]129; AH: INT 13h function to call
130; DL: Drive number
131; DS: RAMVARS segment
[3]132; Returns:
133; Depends on function
134; Corrupts registers:
[148]135; BX, DI, ES
[3]136;--------------------------------------------------------------------
137ALIGN JUMP_ALIGN
[148]138Int13h_CallPreviousInt13hHandler:
[3]139 push di
[148]140 call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
141 int BIOS_DISK_INTERRUPT_13h
142 call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
143 pop di
144 ret
[35]145
[3]146
147;--------------------------------------------------------------------
[148]148; ExchangeCurrentInt13hHandlerWithOldInt13hHandler
[3]149; Parameters:
150; DS: RAMVARS segment
151; Returns:
[148]152; Nothing
[3]153; Corrupts registers:
[148]154; DI
[3]155;--------------------------------------------------------------------
156ALIGN JUMP_ALIGN
[148]157ExchangeCurrentInt13hHandlerWithOldInt13hHandler:
158 push es
159 LOAD_BDA_SEGMENT_TO es, di
160 mov di, [RAMVARS.fpOldI13h]
[150]161 cli
[148]162 xchg di, [es:BIOS_DISK_INTERRUPT_13h*4]
163 mov [RAMVARS.fpOldI13h], di
164 mov di, [RAMVARS.fpOldI13h+2]
165 xchg di, [es:BIOS_DISK_INTERRUPT_13h*4+2]
166 mov [RAMVARS.fpOldI13h+2], di
[161]167 sti
[148]168 pop es
169 ret
[28]170
[35]171
[150]172;--------------------------------------------------------------------
173; Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH
174; Int13h_SetErrorCodeToIntpackInSSBPfromAH
175; Parameters:
176; AH: BIOS error code (00h = no error)
177; SS:BP: Ptr to IDEPACK
178; Returns:
179; SS:BP: Ptr to IDEPACK with error condition set
180; Corrupts registers:
181; DS, DI
182;--------------------------------------------------------------------
183ALIGN JUMP_ALIGN
184Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH:
185 ; Store error code to BDA
186 LOAD_BDA_SEGMENT_TO ds, di
187 mov [BDA.bHDLastSt], ah
[35]188
[150]189 ; Store error code to INTPACK
190Int13h_SetErrorCodeToIntpackInSSBPfromAH:
191 mov [bp+IDEPACK.intpack+INTPACK.ah], ah
192 test ah, ah
193 jnz SHORT .SetCFtoIntpack
194 and BYTE [bp+IDEPACK.intpack+INTPACK.flags], ~FLG_FLAGS_CF
195 ret
196.SetCFtoIntpack:
197 or BYTE [bp+IDEPACK.intpack+INTPACK.flags], FLG_FLAGS_CF
198 ret
199
200
[3]201; Jump table for correct BIOS function
202ALIGN WORD_ALIGN
203g_rgw13hFuncJump:
204 dw AH0h_HandlerForDiskControllerReset ; 00h, Disk Controller Reset (All)
205 dw AH1h_HandlerForReadDiskStatus ; 01h, Read Disk Status (All)
206 dw AH2h_HandlerForReadDiskSectors ; 02h, Read Disk Sectors (All)
207 dw AH3h_HandlerForWriteDiskSectors ; 03h, Write Disk Sectors (All)
208 dw AH4h_HandlerForVerifyDiskSectors ; 04h, Verify Disk Sectors (All)
[90]209 dw Int13h_UnsupportedFunction ; 05h, Format Disk Track (XT, AT, EISA)
[3]210 dw Int13h_UnsupportedFunction ; 06h, Format Disk Track with Bad Sectors (XT)
211 dw Int13h_UnsupportedFunction ; 07h, Format Multiple Cylinders (XT)
212 dw AH8h_HandlerForReadDiskDriveParameters ; 08h, Read Disk Drive Parameters (All)
213 dw AH9h_HandlerForInitializeDriveParameters ; 09h, Initialize Drive Parameters (All)
214 dw Int13h_UnsupportedFunction ; 0Ah, Read Disk Sectors with ECC (XT, AT, EISA)
215 dw Int13h_UnsupportedFunction ; 0Bh, Write Disk Sectors with ECC (XT, AT, EISA)
216 dw AHCh_HandlerForSeek ; 0Ch, Seek (All)
217 dw AHDh_HandlerForResetHardDisk ; 0Dh, Alternate Disk Reset (All)
218 dw Int13h_UnsupportedFunction ; 0Eh, Read Sector Buffer (XT, PS/1), ESDI Undocumented Diagnostic (PS/2)
219 dw Int13h_UnsupportedFunction ; 0Fh, Write Sector Buffer (XT, PS/1), ESDI Undocumented Diagnostic (PS/2)
220 dw AH10h_HandlerForCheckDriveReady ; 10h, Check Drive Ready (All)
221 dw AH11h_HandlerForRecalibrate ; 11h, Recalibrate (All)
222 dw Int13h_UnsupportedFunction ; 12h, Controller RAM Diagnostic (XT)
223 dw Int13h_UnsupportedFunction ; 13h, Drive Diagnostic (XT)
[90]224 dw Int13h_UnsupportedFunction ; 14h, Controller Internal Diagnostic (All)
[3]225 dw AH15h_HandlerForReadDiskDriveSize ; 15h, Read Disk Drive Size (AT+)
[161]226 dw Int13h_UnsupportedFunction ; 16h,
227 dw Int13h_UnsupportedFunction ; 17h,
228 dw Int13h_UnsupportedFunction ; 18h,
[3]229 dw Int13h_UnsupportedFunction ; 19h, Park Heads (PS/2)
230 dw Int13h_UnsupportedFunction ; 1Ah, Format ESDI Drive (PS/2)
231 dw Int13h_UnsupportedFunction ; 1Bh, Get ESDI Manufacturing Header (PS/2)
232 dw Int13h_UnsupportedFunction ; 1Ch, ESDI Special Functions (PS/2)
[161]233 dw Int13h_UnsupportedFunction ; 1Dh,
234 dw Int13h_UnsupportedFunction ; 1Eh,
235 dw Int13h_UnsupportedFunction ; 1Fh,
236 dw Int13h_UnsupportedFunction ; 20h,
[3]237 dw Int13h_UnsupportedFunction ; 21h, Read Disk Sectors, Multiple Blocks (PS/1)
238 dw Int13h_UnsupportedFunction ; 22h, Write Disk Sectors, Multiple Blocks (PS/1)
239 dw AH23h_HandlerForSetControllerFeatures ; 23h, Set Controller Features Register (PS/1)
240 dw AH24h_HandlerForSetMultipleBlocks ; 24h, Set Multiple Blocks (PS/1)
241 dw AH25h_HandlerForGetDriveInformation ; 25h, Get Drive Information (PS/1)
[165]242
243g_rgwEbiosFunctionJumpTable:
244 dw AH41h_HandlerForCheckIfExtensionsPresent ; 41h, Check if Extensions Present (EBIOS)*
245 dw AH42h_HandlerForExtendedReadSectors ; 42h, Extended Read Sectors (EBIOS)*
246 dw AH43h_HandlerForExtendedWriteSectors ; 43h, Extended Write Sectors (EBIOS)*
247 dw AH44h_HandlerForExtendedVerifySectors ; 44h, Extended Verify Sectors (EBIOS)*
248 dw Int13h_UnsupportedFunction ; 45h, Lock and Unlock Drive (EBIOS)***
249 dw Int13h_UnsupportedFunction ; 46h, Eject Media Request (EBIOS)***
250 dw AH47h_HandlerForExtendedSeek ; 47h, Extended Seek (EBIOS)*
251 dw AH48h_HandlerForGetExtendedDriveParameters ; 48h, Get Extended Drive Parameters (EBIOS)*
[150]252; dw Int13h_UnsupportedFunction ; 49h, Get Extended Disk Change Status (EBIOS)***
[3]253; dw Int13h_UnsupportedFunction ; 4Ah, Initiate Disk Emulation (Bootable CD-ROM)
254; dw Int13h_UnsupportedFunction ; 4Bh, Terminate Disk Emulation (Bootable CD-ROM)
255; dw Int13h_UnsupportedFunction ; 4Ch, Initiate Disk Emulation and Boot (Bootable CD-ROM)
256; dw Int13h_UnsupportedFunction ; 4Dh, Return Boot Catalog (Bootable CD-ROM)
[150]257; dw Int13h_UnsupportedFunction ; 4Eh, Set Hardware Configuration (EBIOS)**
258;
259; * = Enhanced Drive Access Support (minimum required EBIOS functions)
260; ** = Enhanced Disk Drive (EDD) Support
261; *** = Drive Locking and Ejecting Support
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